Question

The seventh term of ap is -4 and 13th term of ap 16 find ap

Answer 1

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Answer 2

x7=-4

x13=16

x1+6d=-4

x1+12d=16

(12-6)d=16-(-4)

6d=20

d=20/6

x1=x7-6d

=-4-6×20/6

=-4-20

=-24

x2=-24+20/6

=-144/6